// 示例1
let n: number = 1;
let x: number = 3.5;
console.log(`n 的值是: ${n}`);
console.log(`x 的值是: ${x}`);

// 示例2
let val: BigInt = BigInt("1234567890");
console.log(`val 的值是：${val}`);

// 示例3
let s: string = "hello";
console.log(`s 的值是：${s}`);